The Spartans did support Brasidas and regarded him as a founder of the city because of his virtue and service.

he was a Spartan leader during the peloponnesian war

Ummm.....Leonitas. there is also Brasidas, gylippos, and pausanias.

He used new practices of war. he invaded areas controlled by Athens which supplied lumber and silver. The old Spartan tactics called for direct engagement of soldiers. Pericles of Athens refused to meet the Spartan army in the open thus prolonging the war. Brasidas' invasions of the sister states of Athens brought a close to the war.

The Spartan Brasidas and the Athenian Cleon were both killed in the battle of Amphipolis in 422 BCE.